Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dfcb87acc960b9b…

MALICIOUS

PDF

53.4 KB Created: 2020-08-17 01:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 839a0deb8a2a7dd0788d6f5465a2b141 SHA-1: 399a5276065523ce4119efaf4e4291cf67881efd SHA-256: 3dfcb87acc960b9b2559773e51eb48e53ccb2c153e064b0857359eef1e3a3fdd
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains text related to 'app store review guidelines updates' and the malicious URL itself, suggesting a phishing or scam attempt. The PDF also hosts a large number of external links, many of which point to benign Shopify domains, likely as a form of SEO manipulation to mask the malicious redirector.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=app+store+review+guidelines+updates
    • http://gububugox.lindsayappelman.com/uploads/1/3/2/8/132814975/6755565.pdf
    • https://cdn.shopify.com/s/files/1/0438/8074/3080/files/walter_benjamin_violencia.pdf
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/vemoxomazepisuk.pdf
    • https://cdn.shopify.com/s/files/1/0438/3516/2784/files/39721419575.pdf
    • https://cdn.shopify.com/s/files/1/0428/6906/3836/files/viwutanudamepijobitet.pdf
    • https://cdn.shopify.com/s/files/1/0433/6621/9941/files/probability_distribution_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/kosefa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61086590007.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1073/files/agricultural_science_education.pdf
    • https://cdn.shopify.com/s/files/1/0440/7679/4021/files/45223331787.pdf
    • https://cdn.shopify.com/s/files/1/0434/4712/4130/files/rituel_pour_attirer_l_argent.pdf
    • https://cdn.shopify.com/s/files/1/0430/3188/8035/files/nafin.pdf
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/debye_huckel_equation.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000092d6.bin
4725050c28f88088d057ad0d2f8ca00853ded8076cddad00e3ff0777fea65801		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92D6 5268 bytes
font_01_sfnt_off0000a4e5.bin
eb9f446bd67d61ab214a09dadf227319168fbc0139ee89c4fa8a13646861c4f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4E5 10508 bytes

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